Tazzer, have you considered engine turning? Chuck a rubberized abrasive like a Cratex or similar, and program a series of downfeed commands for overlapping coverage.
If you can possibly do it without CNC, try this: A very nice, non-directional matte finish can be created on aluminum with a palm, vibratory hand sander (like a Makita or Ryobi) loaded with 400 grit wet/dry. Spray the surface liberally with WD-40 or any light oil (you can use water too, watch out for electricity), and simply apply the sander to the aluminum. It leaves behind a very pleasant matte finish, without any directional "grain" such as what you'd get with a sanding block stroked in one direction. Try it! |